Jesse Spencer Matthew Casey Actor Taylor Kinney Kelly Severide Actor Charlie Barnett Peter Mills Actor Monica Raymund Gabriela Dawson Actor Lauren German Leslie Shay Actor Eamonn Walker Chief Wallace Boden Actor David Eigenberg Christopher Herrmann Actor Teri Reeves Hallie Thomas Actor Sarah Shahi Renée Royce Guest Star Joe Minoso Joe Cruz Guest Star Yuri Sardarov Brian Zvonecek Guest Star Christian Stolte Randall McHolland Guest Star Shiri Appleby Clarice Guest Star Cody Sullivan Ernie Guest Star Nicole Forester Christie Guest Star Ron Dean James Whoritsky Guest Star Kathleen Quinlan Nancy Casey Guest Star Treat Williams Benny Severide Guest Star Darrell W. Cox Raymond Martin Guest Star Matt Kozlowski Fortenberry Guest Star Cedric Young Der District Chief Arend Guest Star Chris Agos Dr. Doriot Guest Star Derek Haas Executive Producer, Writer Michael Brandt Executive Producer, Writer Jeffrey Nachmanoff Executive Producer Dick Wolf Executive Producer Peter Jankowski Executive Producer Danielle Gelber Executive Producer Alik Sakharov Director